Dogcows Code - chaz/openbox/blob - obt/parse.c

   1 /* -*- indent-tabs-mode: nil; tab-width: 4; c-basic-offset: 4; -*-
   2
   3    obt/parse.c for the Openbox window manager
   4    Copyright (c) 2003-2007   Dana Jansens
   5
   6    This program is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 2 of the License, or
   9    (at your option) any later version.
  10
  11    This program is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    See the COPYING file for a copy of the GNU General Public License.
  17 */
  18
  19 #include "obt/parse.h"
  20 #include "obt/paths.h"
  21
  22 #include <glib.h>
  23
  24 #ifdef HAVE_STDLIB_H
  25 #  include <stdlib.h>
  26 #endif
  27 #ifdef HAVE_SYS_STAT_H
  28 #  include <sys/stat.h>
  29 #endif
  30 #ifdef HAVE_SYS_TYPES_H
  31 #  include <sys/types.h>
  32 #endif
  33 #ifdef HAVE_UNISTD_H
  34 #  include <unistd.h>
  35 #endif
  36
  37 struct Callback {
  38     gchar *tag;
  39     ObtParseCallback func;
  40     gpointer data;
  41 };
  42
  43 struct _ObtParseInst {
  44     gint ref;
  45     ObtPaths *xdg_paths;
  46     GHashTable *callbacks;
  47     xmlDocPtr doc;
  48     xmlNodePtr root;
  49     gchar *path;
  50 };
  51
  52 static void destfunc(struct Callback *c)
  53 {
  54     g_free(c->tag);
  55     g_free(c);
  56 }
  57
  58 ObtParseInst* obt_parse_instance_new(void)
  59 {
  60     ObtParseInst *i = g_new(ObtParseInst, 1);
  61     i->ref = 1;
  62     i->xdg_paths = obt_paths_new();
  63     i->callbacks = g_hash_table_new_full(g_str_hash, g_str_equal, NULL,
  64                                          (GDestroyNotify)destfunc);
  65     i->doc = NULL;
  66     i->root = NULL;
  67     i->path = NULL;
  68     return i;
  69 }
  70
  71 void obt_parse_instance_ref(ObtParseInst *i)
  72 {
  73     ++i->ref;
  74 }
  75
  76 void obt_parse_instance_unref(ObtParseInst *i)
  77 {
  78     if (i && --i->ref == 0) {
  79         obt_paths_unref(i->xdg_paths);
  80         g_hash_table_destroy(i->callbacks);
  81         g_free(i);
  82     }
  83 }
  84
  85 xmlDocPtr obt_parse_doc(ObtParseInst *i)
  86 {
  87     g_assert(i->doc); /* a doc is open? */
  88     return i->doc;
  89 }
  90
  91 xmlNodePtr obt_parse_root(ObtParseInst *i)
  92 {
  93     g_assert(i->doc); /* a doc is open? */
  94     return i->root;
  95 }
  96
  97 void obt_parse_register(ObtParseInst *i, const gchar *tag,
  98                         ObtParseCallback func, gpointer data)
  99 {
 100     struct Callback *c;
 101
 102     if ((c = g_hash_table_lookup(i->callbacks, tag))) {
 103         g_error("Tag '%s' already registered", tag);
 104         return;
 105     }
 106
 107     c = g_new(struct Callback, 1);
 108     c->tag = g_strdup(tag);
 109     c->func = func;
 110     c->data = data;
 111     g_hash_table_insert(i->callbacks, c->tag, c);
 112 }
 113
 114 static gboolean load_file(ObtParseInst *i,
 115                           const gchar *domain,
 116                           const gchar *filename,
 117                           const gchar *root_node,
 118                           GSList *paths)
 119 {
 120     GSList *it;
 121     gboolean r = FALSE;
 122
 123     g_assert(i->doc == NULL); /* another doc isn't open already? */
 124
 125     for (it = paths; !r && it; it = g_slist_next(it)) {
 126         gchar *path;
 127         struct stat s;
 128
 129         if (!domain && !filename) /* given a full path to the file */
 130             path = g_strdup(it->data);
 131         else
 132             path = g_build_filename(it->data, domain, filename, NULL);
 133
 134         if (stat(path, &s) >= 0) {
 135             /* XML_PARSE_BLANKS is needed apparently, or the tree can end up
 136                with extra nodes in it. */
 137             i->doc = xmlReadFile(path, NULL, (XML_PARSE_NOBLANKS |
 138                                               XML_PARSE_RECOVER));
 139             if (i->doc) {
 140                 i->root = xmlDocGetRootElement(i->doc);
 141                 if (!i->root) {
 142                     xmlFreeDoc(i->doc);
 143                     i->doc = NULL;
 144                     g_message("%s is an empty XML document", path);
 145                 }
 146                 else if (xmlStrcmp(i->root->name,
 147                                    (const xmlChar*)root_node)) {
 148                     xmlFreeDoc(i->doc);
 149                     i->doc = NULL;
 150                     i->root = NULL;
 151                     g_message("XML document %s is of wrong type. Root "
 152                               "node is not '%s'", path, root_node);
 153                 }
 154                 else {
 155                     i->path = g_strdup(path);
 156                     r = TRUE; /* ok! */
 157                 }
 158             }
 159         }
 160
 161         g_free(path);
 162     }
 163
 164     return r;
 165 }
 166
 167 gboolean obt_parse_load_file(ObtParseInst *i,
 168                              const gchar *path,
 169                              const gchar *root_node)
 170 {
 171     GSList *paths;
 172     gboolean r;
 173
 174     paths = g_slist_append(NULL, g_strdup(path));
 175
 176     r = load_file(i, NULL, NULL, root_node, paths);
 177
 178     while (paths) {
 179         g_free(paths->data);
 180         paths = g_slist_delete_link(paths, paths);
 181     }
 182     return r;
 183 }
 184
 185 gboolean obt_parse_load_config_file(ObtParseInst *i,
 186                                     const gchar *domain,
 187                                     const gchar *filename,
 188                                     const gchar *root_node)
 189 {
 190     GSList *it, *paths = NULL;
 191     gboolean r;
 192
 193     for (it = obt_paths_config_dirs(i->xdg_paths); it; it = g_slist_next(it))
 194         paths = g_slist_append(paths, g_strdup(it->data));
 195
 196     r = load_file(i, domain, filename, root_node, paths);
 197
 198     while (paths) {
 199         g_free(paths->data);
 200         paths = g_slist_delete_link(paths, paths);
 201     }
 202     return r;
 203 }
 204
 205 gboolean obt_parse_load_data_file(ObtParseInst *i,
 206                                   const gchar *domain,
 207                                   const gchar *filename,
 208                                   const gchar *root_node)
 209 {
 210     GSList *it, *paths = NULL;
 211     gboolean r;
 212
 213     for (it = obt_paths_data_dirs(i->xdg_paths); it; it = g_slist_next(it))
 214         paths = g_slist_append(paths, g_strdup(it->data));
 215
 216     r = load_file(i, domain, filename, root_node, paths);
 217
 218     while (paths) {
 219         g_free(paths->data);
 220         paths = g_slist_delete_link(paths, paths);
 221     }
 222     return r;
 223 }
 224
 225 gboolean obt_parse_load_theme_file(ObtParseInst *i,
 226                                    const gchar *theme,
 227                                    const gchar *domain,
 228                                    const gchar *filename,
 229                                    const gchar *root_node)
 230 {
 231     GSList *it, *paths = NULL;
 232     gboolean r;
 233
 234     /* use ~/.themes for backwards compatibility */
 235     paths = g_slist_append
 236         (paths, g_build_filename(g_get_home_dir(), ".themes", theme, NULL));
 237
 238     for (it = obt_paths_data_dirs(i->xdg_paths); it; it = g_slist_next(it))
 239         paths = g_slist_append
 240             (paths, g_build_filename(it->data, "themes", theme, NULL));
 241
 242     r = load_file(i, domain, filename, root_node, paths);
 243
 244     while (paths) {
 245         g_free(paths->data);
 246         paths = g_slist_delete_link(paths, paths);
 247     }
 248     return r;
 249 }
 250
 251
 252 gboolean obt_parse_load_mem(ObtParseInst *i,
 253                             gpointer data, guint len, const gchar *root_node)
 254 {
 255     gboolean r = FALSE;
 256
 257     g_assert(i->doc == NULL); /* another doc isn't open already? */
 258
 259     i->doc = xmlParseMemory(data, len);
 260     if (i) {
 261         i->root = xmlDocGetRootElement(i->doc);
 262         if (!i->root) {
 263             xmlFreeDoc(i->doc);
 264             i->doc = NULL;
 265             g_message("Given memory is an empty document");
 266         }
 267         else if (xmlStrcmp(i->root->name, (const xmlChar*)root_node)) {
 268             xmlFreeDoc(i->doc);
 269             i->doc = NULL;
 270             i->root = NULL;
 271             g_message("XML Document in given memory is of wrong "
 272                       "type. Root node is not '%s'\n", root_node);
 273         }
 274         else
 275             r = TRUE; /* ok ! */
 276     }
 277     return r;
 278 }
 279
 280 void obt_parse_close(ObtParseInst *i)
 281 {
 282     if (i && i->doc) {
 283         xmlFreeDoc(i->doc);
 284         g_free(i->path);
 285         i->doc = NULL;
 286         i->root = NULL;
 287         i->path = NULL;
 288     }
 289 }
 290
 291 void obt_parse_tree(ObtParseInst *i, xmlNodePtr node)
 292 {
 293     g_assert(i->doc); /* a doc is open? */
 294
 295     while (node) {
 296         struct Callback *c = g_hash_table_lookup(i->callbacks, node->name);
 297         if (c) c->func(node, c->data);
 298         node = node->next;
 299     }
 300 }
 301
 302 void obt_parse_tree_from_root(ObtParseInst *i)
 303 {
 304     obt_parse_tree(i, i->root->children);
 305 }
 306
 307 gchar *obt_parse_node_string(xmlNodePtr node)
 308 {
 309     xmlChar *c = xmlNodeGetContent(node);
 310     gchar *s = g_strdup(c ? (gchar*)c : "");
 311     xmlFree(c);
 312     return s;
 313 }
 314
 315 gint obt_parse_node_int(xmlNodePtr node)
 316 {
 317     xmlChar *c = xmlNodeGetContent(node);
 318     gint i = c ? atoi((gchar*)c) : 0;
 319     xmlFree(c);
 320     return i;
 321 }
 322
 323 gboolean obt_parse_node_bool(xmlNodePtr node)
 324 {
 325     xmlChar *c = xmlNodeGetContent(node);
 326     gboolean b = FALSE;
 327     if (c && !xmlStrcasecmp(c, (const xmlChar*) "true"))
 328         b = TRUE;
 329     else if (c && !xmlStrcasecmp(c, (const xmlChar*) "yes"))
 330         b = TRUE;
 331     else if (c && !xmlStrcasecmp(c, (const xmlChar*) "on"))
 332         b = TRUE;
 333     xmlFree(c);
 334     return b;
 335 }
 336
 337 gboolean obt_parse_node_contains(xmlNodePtr node, const gchar *val)
 338 {
 339     xmlChar *c = xmlNodeGetContent(node);
 340     gboolean r;
 341     r = !xmlStrcasecmp(c, (const xmlChar*) val);
 342     xmlFree(c);
 343     return r;
 344 }
 345
 346 xmlNodePtr obt_parse_find_node(xmlNodePtr node, const gchar *tag)
 347 {
 348     while (node) {
 349         if (!xmlStrcmp(node->name, (const xmlChar*) tag))
 350             return node;
 351         node = node->next;
 352     }
 353     return NULL;
 354 }
 355
 356 gboolean obt_parse_attr_bool(xmlNodePtr node, const gchar *name,
 357                              gboolean *value)
 358 {
 359     xmlChar *c = xmlGetProp(node, (const xmlChar*) name);
 360     gboolean r = FALSE;
 361     if (c) {
 362         if (!xmlStrcasecmp(c, (const xmlChar*) "true"))
 363             *value = TRUE, r = TRUE;
 364         else if (!xmlStrcasecmp(c, (const xmlChar*) "yes"))
 365             *value = TRUE, r = TRUE;
 366         else if (!xmlStrcasecmp(c, (const xmlChar*) "on"))
 367             *value = TRUE, r = TRUE;
 368         else if (!xmlStrcasecmp(c, (const xmlChar*) "false"))
 369             *value = FALSE, r = TRUE;
 370         else if (!xmlStrcasecmp(c, (const xmlChar*) "no"))
 371             *value = FALSE, r = TRUE;
 372         else if (!xmlStrcasecmp(c, (const xmlChar*) "off"))
 373             *value = FALSE, r = TRUE;
 374     }
 375     xmlFree(c);
 376     return r;
 377 }
 378
 379 gboolean obt_parse_attr_int(xmlNodePtr node, const gchar *name, gint *value)
 380 {
 381     xmlChar *c = xmlGetProp(node, (const xmlChar*) name);
 382     gboolean r = FALSE;
 383     if (c) {
 384         *value = atoi((gchar*)c);
 385         r = TRUE;
 386     }
 387     xmlFree(c);
 388     return r;
 389 }
 390
 391 gboolean obt_parse_attr_string(xmlNodePtr node, const gchar *name,
 392                                gchar **value)
 393 {
 394     xmlChar *c = xmlGetProp(node, (const xmlChar*) name);
 395     gboolean r = FALSE;
 396     if (c) {
 397         *value = g_strdup((gchar*)c);
 398         r = TRUE;
 399     }
 400     xmlFree(c);
 401     return r;
 402 }
 403
 404 gboolean obt_parse_attr_contains(xmlNodePtr node, const gchar *name,
 405                                  const gchar *val)
 406 {
 407     xmlChar *c = xmlGetProp(node, (const xmlChar*) name);
 408     gboolean r = FALSE;
 409     if (c)
 410         r = !xmlStrcasecmp(c, (const xmlChar*) val);
 411     xmlFree(c);
 412     return r;
 413 }